Are injector pintle caps needed?

[BigVinnie]

Originally Posted by UNISA JECS

I dont even think you can get them from there, best bet is to call up a place that cleans injectors and ask them if you can buy some.

Rc engineering will clean injectors, and from what I have been told is that I need to get them from the manufacturer.

Can I use the sr20det injector caps on the q45 injectors? I've been told that there are variances but I don't see why it matters since the inlet boss diameters are the same, (or so I've been told).

I have a local E85 gas station down the street from my house and I wanted to put these 370cc injectors in, I burned up my stock 270cc injectors from a high duty cycle so I'm going to try something a little different with my NA/KA setup.

Originally Posted by TheRealNighthog

They hold the lower o rings in.

I am confused by this answer just because the lower ring is mounted higher on the injector than where the pintle cap is located.

Location of pintle cap..


Location of the O ring.